著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Perumpral, J. V. and Liljedahl, J. B. and Perloff, W. H.",A numerical method for predicting the stress distribution and soil deformation under a tractor wheel,,資料協会,,海外研究開発レポート,,,,https://cir.nii.ac.jp/crid/1130000798282601856